Square Tube Roller for linear motion

This piece is meant to be used to allow smooth linear motion in a light duty cnc or printer.
I designed this based on a method I saw somewhere on the web for mounting 608 bearings to a piece of angled aluminum. If i remember where i saw it i will update with a link. The idea is that you turn a square tube 45 degrees, and this will roll along the top of it. You could also use a piece of angle iron too, laying on its hypotenuse. There are mounting holes that allow you to mount something on t